Sand-blast machine.



J. J. STRASSER. SAND'BLAST MACHINE.

APPLICATION FILED 00T. 21%19140r 'Patented Oct.1,1912.

- JOHN J. srnassnn or cHrcAGo, ILLrNors.

- sANoBLAs'r MACHINE.'

nosasio.

applicati@ flied umher21.1910.v serial message To o'ZZ whom 'it may concernf` Be it known that L'Joi-IN'J. SrRAssEm-'a citizen of the United States, .residing at Chicago, in the county of'fC-ook and Sta-te of .5 Illinois, have invented a certain new and' useful Improvement in Sand-Blast Machines, of which the following is a full,`

clear, concise, and exact description, reference being had to the accompanying draw,- o ings, forming a part of this specification.-

My invention relates to sandl blastsor 'simil'ar devices and has 'for itsg'objectvthe provision of an improvedmachine for applying sand or similar material forciblyagainst obJects upon whichv its abrasive or' similar effect is'desired.

'While my invention, of course, hasta great many uses and applications, I will throughout the remaintlerof lthe description conline" 2 0 myself toexplaining itin connectionwithavsand blast, without meaning thereby to-limit myselfto suchapplication,.and will', vthen point out ,the novelty broadly in vthe ap#4 pended claims.

My invention 'contemplatesl theprovision of fa reservoir providedwith-sand, lv vhi'ch reservoir` has outlet means through which the sand may be withdrawn'from lsaid reser voir. A tube leads from said outlet and it 30. vis preferablyprovided with a nozzle through which the sand may issue forth, and:r in 'asso-y ciation with said tube at some predetermined most effective point throughout `vits length,

an air blast enters said `tube whosetendenyf. is to blow out at l'the end of the-tube and thereby withdraw'sand from' lthe reservoir by suction.. The novelty contemplated is this withdrawal ofthe sand by the'sucti'on v intluenceofthe air blast, andI obtain better results than if the air and sand weremingled 'at the reservoir. My invention contemplates a new and improved nozzle to elfectthis result.. My. invention 4also .contemplates i the provision of means to permit .the entrance 4 5 of air at or near the outletoigsaid reservoir-l when the sand is tobe withdrawn. My invention also contemplates. novel` .means`to vpermit this entrance of airwithout permitting loss or escape of the sandthereat 50 I will explainl my invention more 4in de`v tail by reference to the ac'company1ngdraw ing illustrating the" preferred' embodiment thereof in which:`

Figure 1 represents anelevationpartly 1n .55 section of my complete device; Fig; 2 repre# 41 a sents in enlarged section the 'sand outlet and air inlet means in their preferred form; Fig.

3- represents a modification v of the structure o f Fig. 2, and: F1g.'4` isla sectional view. on lines a, o -of- Fig. 2. V

. to prevent pebbles or other, objectionable articles from enterin" the devices to be presently described.l A lower 6 is provided to pe-ar. The Iou't-lettube '7 enters the cylinactuated issue 'through said. tube 7 and .th-rough a lexibleconnecting tube l8 through my' sand discharge tube' 9. `lhetube-.Q eniter's the nozzlel 10-and is so arranged as to pointtoward the outer' extremity of saidnozzle'; thenozzle 10 by means preferably of a lleXible tube 11. is 'connected directly with the blower 6. fAir'isorce'd intothe tubel 11 andthen 'throughthe nozzlelO and pastthe open Ain outhj :of the vtube 9, and the partial vacuum present in the tubev 8 vsucks the sand 'from'the reservoir 1 through. the tube 7 and,l forces it in a stream'out throughthe nozzle 110. The nozzle l0 tlien', of course, can `be directed against the article oii whichit is desr'ed to'use the 'abrasive effects of the sand blast -r 'trance Of'airat or near the outlet portion of -t l1e"reservo1 r, namely, near the tube 7 and- 7 is .shown-"as entering theeylindrical ter'- minus'2 and' where it is lparti ally intersected by a second tube 12, which second? tube enters from'the right land is secured in place by'means of-two-nuts 13,"13. The tub'e12 crossesthe tube 7'as 'is more clearly apparent rom 4, vandfthat portion ofthe left. *handextremity of tube l2 which does not- -lie' withinthe tube 7 is closed by the end fwal'l 14.` The air` can thus enter through .the opening 15,' through the-tube 12 and into the tube 7, but the tube 7 .on account yof the wall 14 does, not permit the sand to obstruct the passage -ofgthe air nor let the sandin .the normal operation of thedevice leave the reservoir through the tube 12.'l Inthe modi-- tube 12 and in place thereof pnovide .an

In these'gures -Ishowafsand reservoir 1 v '.1I:ind.it ofigr-eat importance to pei-init en# fication illustrated in Fig.'3,I' dispense Awith furnish the' air blast asl willfprsently.- ap-l -7`0 dri-cal terminus -2 and then proJects into the sand. 'Sandmay therefore, when properly opening 16 through Which-the airfinay enter the tube?.

lil/'bile l haveherein shown and particularly deseribed'thev preferred lembodiment of my inventiomjl do not `iiiean to limit myself tothe precise construction and arrange.-

nient as herein set forth, 4but Having `thus described my invention, what `l. claim as-new and desire to secure by Let# ters Patent is;

lf'fllie. coiiibiiiation of a reservoir for coinni'inuted material, a substantially horizontal tubular member for the outward iow of the cominiiiuted material, said tubular member being arranged at the lower part of the reservoir and .having an opening to the outside air and also aii-opeiiingvwithin the reservoir for the vadmission of `the coiniiiinuted material, said 'last inentioned opening beingwn the underv side of said .tubular iiieinber wherebyit is prevented from being choked bythe' material within the. reservoir.

2. In a device of the classv described in feombiiiation, a sand reservoir, a t'iibe con'- sisting Vof two integral. portions connected with "eachother, butythe axes of said portions being odset troni each other, one of said tubular portions'eonnecting with the" at- '30.1V iiiosphei'eexterior to the reservoir, the other Y a sand reservoirla iiozile, rneaiis-forfsupply-- ing air'torsaid nozzle, a conduit for carry. ing sand troni said reservoir to said nozzle and a device for introducing air vand sand into said conduit,- said-device vcomprising la pair.' of horizontal intersecting tubes', the.

axes of said tubes being at different elevatioi`is,the lower of. said tubes 4opening into said reservoir at itsv lower portion and into the upper'of said tubes atits upper portion,

,saidupper tube communicating with the atmosphere ,at one end and being closed to the reservoir at'its 'other eiid.

4. yIn arial-r blast ,apparatus in combina# tion7 'a reservoir having a downwardly ta.-

pering lower portion, acylindrical portion depending troni said tapering portion, a

- pair of integral tubes extending through the wallsot' said cylindrical portion, saidti'ibes having. their longitudinal axes in the saine vertical plane but. one being somewhat below fthe other,` the walls of said tubes intersecting each other for a portion ot their length, the lower ofsaid tubes opening into the upper one'and alsoA into the reservoir, the upper of saidtubes being closed tothe reservoir except through the lower tube, said tubes being open at their outer end.

`5. The combination of a reservoir for corniiii-nuted material. a tubular ineinber for `the outward flow of the eoniininuted inaterial. said tubular meiiiber being arranged atthe lower part of the' reservoir and having '-withiii -tlieieservoir an opening for the admission et outside yair and also an opening for the .admission of coiiiiniiiuted material', said air'popening being above said coinininuted material opening. Y

'In witness whereof, I hereunto subscribeiny naine this 7th dagv of October', A. D.

JOHN J. STRASSER..

lVit-nesses XMiL-LER BiiiriiiLD,

A. LYDA JONES. 

